[ovirt-users] VM Deployment By Template

Shahar Havivi shaharh at redhat.com
Thu Aug 28 06:49:24 UTC 2014


On 28.08.14 11:05, Punit Dambiwal wrote:
> Hi All,
> 
> Please help me to solve this problem...or suggest me any workaround ??
> 
> Thanks,
> Punit
> 
> 
> On Wed, Aug 27, 2014 at 8:01 PM, Karli Sjöberg <Karli.Sjoberg at slu.se> wrote:
> 
> > On Wed, 2014-08-27 at 19:52 +0800, Punit Dambiwal wrote:
> > > Hi Itamar,
> > >
> > >
> > > It's the same as i used and discussed in last reply...create the VM
> > > with 1GB virtual template and expand the disk size after
> > > deployment...but the problem here is disk will expand or resize...but
> > > it will not make any changes in the existing partition table..that
> > > means after expand disk all the existing partition will remain
> > > same....then you need to manual login in to server and make the
> > > changes with the help of fdisk and lvm commands..
> > >
> > >
> > > I am looking for the way we can resize the disk...and at the same time
> > > when the disk will expand...it should be resize the partition table...
> >
> > I think this is what you were after:
> > "QEMU-GA
> >
> >     support for notifying the guest and updating the size of the visible
> > disk: To be integrated "
> >
> > So maybe you could post an RFE on that for "qemu-ga"? Help testing?
> >
> > /K
> >
> > >
> > >
> > > Is the cloud-init...custom script can do this or not ??
You may be able to do that with cloud-init custom-script section,
The following link will show you how to add a file to the client, you may write a code
that change the partition table, you need to make the file executable and put
it in a init section (such as /etc/init.d sections), the only problem is that
it may be too late since cloud-init may be loaded after that phase... (so
maybe other place...)
http://cloudinit.readthedocs.org/en/latest/topics/examples.html#writing-out-arbitrary-files

Another option is to set a command under this section:
http://cloudinit.readthedocs.org/en/latest/topics/examples.html#run-commands-on-first-boot

  Shahar.

> > >
> > >
> > > Thanks,
> > > Punit
> > >
> > >
> > > On Wed, Aug 27, 2014 at 6:11 PM, Itamar Heim <iheim at redhat.com> wrote:
> > >         On 08/27/2014 12:47 PM, Punit Dambiwal wrote:
> > >
> > >                 Hi Itamar,
> > >
> > >                 To edit the disk size are you referring this "Another
> > >                 way i got is
> > >                 create the VM with 1GB virtual template and expand the
> > >                 disk size after
> > >                 deployment...but the problem here is disk will
> > >                 expand...but it will not
> > >                 done any changes in the existing partition table..that
> > >                 means after
> > >                 expand disk you need to manual login in to server and
> > >                 make the changes
> > >                 with the help of fdisk and lvm commands..."
> > >
> > >                 Or it's different then the upper one...please let me
> > >                 know how to perform
> > >                 this...if any screen shot you can provide for better
> > >                 understanding..
> > >
> > >
> > >         http://www.ovirt.org/Features/Online_Virtual_Drive_Resize
> > >         adding derez for follow up questions
> > >
> > >
> > >                 Thanks,
> > >                 Punit
> > >
> > >
> > >                 On Wed, Aug 27, 2014 at 5:15 PM, Itamar Heim
> > >                 <iheim at redhat.com
> > >
> > >                 <mailto:iheim at redhat.com>> wrote:
> > >
> > >                     On 08/27/2014 12:08 PM, Punit Dambiwal wrote:
> > >
> > >                         Hi Itamar,
> > >
> > >                         Thanks for the update....Yes.. i want to
> > >                 create different size
> > >                         VM with
> > >                         the same OS template...
> > >
> > >                         ------------
> > >                         3. we support "disk resize" since 3.4 (iirc),
> > >                 which you can do
> > >                         post VM
> > >                         provisioning.
> > >
> > >                         considering #3, then #1 should be easy to
> > >                 support as well these
> > >                         days.
> > >                         please open an RFE.
> > >                         ------------
> > >
> > >                         Could you please more elaborate point number
> > >                 3...how to use
> > >                         it..i will
> > >                         go with this one ...
> > >
> > >
> > >                     iirc, you just need to edit the disk size when vm
> > >                 is down or up (for
> > >                     up, only for specific disk interfaces, virtio-blk,
> > >                 not ide, iirc)
> > >
> > >                         Thanks,
> > >                         Punit
> > >
> > >
> > >                         On Wed, Aug 27, 2014 at 4:37 PM, Itamar Heim
> > >                 <iheim at redhat.com
> > >                         <mailto:iheim at redhat.com>
> > >
> > >                         <mailto:iheim at redhat.com
> > >                 <mailto:iheim at redhat.com>>> wrote:
> > >
> > >                              On 08/27/2014 04:18 AM, Punit Dambiwal
> > >                 wrote:
> > >
> > >                                  Hi Michal,
> > >
> > >                                  I want to deploy the VM with the
> > >                 template but the
> > >                         problem is in
> > >                                  ovirt
> > >                                  when you deploy the VM by template it
> > >                 copy the whole
> > >                         image(even
> > >                                  thin or
> > >                                  thick disk)...like if i have 40GB
> > >                 virtual size (actual
> > >                         size 1GB)
> > >                                  disk....it will copy the whole 40GB
> > >                 to provision the
> > >                         virtual
> > >                                  machine....so if i want to deploy 10
> > >                 VM simultaneous
> > >                         then it
> > >                                  will copy
> > >                                  4TB data and take long time to
> > >                 provision....
> > >
> > >                                  I want the way i can make the
> > >                 template with small
> > >                         size....and once i
> > >                                  choose to create the virtual machine
> > >                 with 40GB...the VM
> > >                         deploy
> > >                                  with the
> > >                                  small template on the 40GB disk... is
> > >                 it possible with
> > >                         ovirt.. ??
> > >
> > >
> > >                              so you want to provision a VM with a
> > >                 different disk size
> > >                         than template.
> > >                              good point. some thoughts:
> > >                              1. for thinly provisioned (qcow2) - its
> > >                 COW, hence the same
> > >                         size.
> > >                              2. for clone - actually, no reason
> > >                 shouldn't be supported
> > >                         easily.
> > >                              3. we support "disk resize" since 3.4
> > >                 (iirc), which you can
> > >                         do post
> > >                              VM provisioning.
> > >
> > >                              considering #3, then #1 should be easy to
> > >                 support as well these
> > >                              days. please open an RFE.
> > >
> > >
> > >                                  Thanks,
> > >                                  Punit
> > >
> > >
> > >                                  On Tue, Aug 26, 2014 at 9:01 PM,
> > >                 Michal Skrivanek
> > >                                  <michal.skrivanek at redhat.com
> > >                         <mailto:michal.skrivanek at redhat.com>
> > >                                  <mailto:michal.skrivanek at __redhat.com
> > >                         <mailto:michal.skrivanek at redhat.com>>
> > >
> > >                                  <mailto:michal.skrivanek@
> > >                         <mailto:michal.skrivanek@>__red__hat.com
> > >                 <http://redhat.com>
> > >
> > >
> > >                                  <mailto:michal.skrivanek at __redhat.com
> > >                         <mailto:michal.skrivanek at redhat.com>>>> wrote:
> > >
> > >
> > >                                       On Aug 26, 2014, at 12:01 ,
> > >                 Punit Dambiwal
> > >                                  <hypunit at gmail.com
> > >                 <mailto:hypunit at gmail.com>
> > >                         <mailto:hypunit at gmail.com
> > >                 <mailto:hypunit at gmail.com>>
> > >                                       <mailto:hypunit at gmail.com
> > >                         <mailto:hypunit at gmail.com>
> > >                 <mailto:hypunit at gmail.com
> > >                         <mailto:hypunit at gmail.com>>>> wrote:
> > >
> > >                                        > Hi Michal,
> > >                                        >
> > >                                        > 2. I find disk size can not
> > >                 modify at the time
> > >                         of VM
> > >                                       provisioning,is there any way to
> > >                 modify the VM
> > >                         disk size ??
> > >                                        >
> > >                                        > well, not really, AFAIK.
> > >                                        > create another disk, move
> > >                 your data, remove the
> > >                         original Or
> > >                                       create a bigger thin provisioned
> > >                 disk at the
> > >                         beginning...
> > >                                        >
> > >                                        > I didn't understand the
> > >                 mean...i can create the
> > >                         another
> > >                                       disk...it's ok...but how to move
> > >                 the data from the
> > >                         existing
> > >                                  disk to
> > >                                       new disk at the time of the VM
> > >                 deployment... ?? is
> > >                         there
> > >                                  any way to
> > >                                       move the data.. ??
> > >                                       Hi,
> > >
> > >                                       You would have to do that inside
> > >                 the guest…the
> > >                         same way as
> > >                                  you would
> > >                                       do it on real hardware…mount
> > >                 both disks, move the
> > >                         relevant data
> > >                                       not trivial and not automated
> > >
> > >                                        >
> > >                                        > Another question is there any
> > >                 way to mount the
> > >                         img like
> > >                                  i will
> > >                                       create the VM with blank
> > >                 template with my
> > >                         preferred disk
> > >                                  size and
> > >                                       leter on install the OS through
> > >                 any OS template
> > >                         ??? i know
> > >                                  i can
> > >                                       install the OS through CD-ISO
> > >                 but i don't want the
> > >                         manual
> > >                                  installation…
> > >
> > >                                       so you want to have a
> > >                 preinstalled OS…so how did
> > >                         you want
> > >                                  to use it?
> > >                                       I probably don't understand what
> > >                 are you trying to
> > >                         achieve.
> > >                                       Anything else than having a
> > >                 Template with OS and
> > >                         you deploy
> > >                                  VMs from
> > >                                       that….you need to change disk
> > >                 sizes for each such
> > >                         VM? Could
> > >                                  it be
> > >                                       done by adding an additional
> > >                 disk?
> > >
> > >                                       Thanks,
> > >                                       michal
> > >
> > >                                        >
> > >                                        > Thanks,
> > >                                        > Punit
> > >                                        >
> > >                                        >
> > >                                        > On Tue, Aug 26, 2014 at 5:51
> > >                 PM, Michal Skrivanek
> > >                                       <michal.skrivanek at redhat.com
> > >                         <mailto:michal.skrivanek at redhat.com>
> > >                                  <mailto:michal.skrivanek at __redhat.com
> > >                         <mailto:michal.skrivanek at redhat.com>>
> > >
> > >                                  <mailto:michal.skrivanek@
> > >                         <mailto:michal.skrivanek@>__red__hat.com
> > >                 <http://redhat.com>
> > >
> > >
> > >                                  <mailto:michal.skrivanek at __redhat.com
> > >                         <mailto:michal.skrivanek at redhat.com>>>>
> > >
> > >                                       wrote:
> > >                                        >
> > >                                        > On Aug 26, 2014, at 05:26 ,
> > >                 Punit Dambiwal
> > >                                  <hypunit at gmail.com
> > >                 <mailto:hypunit at gmail.com>
> > >                         <mailto:hypunit at gmail.com
> > >                 <mailto:hypunit at gmail.com>>
> > >
> > >                                       <mailto:hypunit at gmail.com
> > >                         <mailto:hypunit at gmail.com>
> > >                 <mailto:hypunit at gmail.com
> > >
> > >                         <mailto:hypunit at gmail.com>>>> wrote:
> > >                                        >
> > >                                        > > Hi All,
> > >                                        > >
> > >                                        > > I have some questions
> > >                 regarding the VM deployment
> > >                                  through OS
> > >                                       template...
> > >                                        > >
> > >                                        > > 1. I have imported centos
> > >                 template from openstack
> > >                                  glance (the
> > >                                       actual size of the template is
> > >                 16GB but used is
> > >                         1GB)...now my
> > >                                       question is if i deploy the new
> > >                 VM with this
> > >                         template,the
> > >                                  process
> > >                                       will copy the whole 16GB or just
> > >                 1 GB to create
> > >                         the new VM ??
> > >                                        >
> > >                                        > if you deploy with thin
> > >                 provisioned disks it
> > >                         should be 1GB
> > >                                        >
> > >                                        > >
> > >                                        > > 2. I find disk size can not
> > >                 modify at the
> > >                         time of VM
> > >                                       provisioning,is there any way to
> > >                 modify the VM
> > >                         disk size ??
> > >                                        >
> > >                                        > well, not really, AFAIK.
> > >                                        > create another disk, move
> > >                 your data, remove the
> > >                         original.
> > >                                        > Or create a bigger thin
> > >                 provisioned disk at the
> > >                         beginning
> > >                                        >
> > >                                        > >
> > >                                        > > Thanks,
> > >                                        > > Punit
> > >                                        > >
> > >                                        > >
> > >                                        > > On Mon, Aug 25, 2014 at
> > >                 5:42 PM, Punit Dambiwal
> > >                                       <hypunit at gmail.com
> > >                 <mailto:hypunit at gmail.com>
> > >                         <mailto:hypunit at gmail.com
> > >                 <mailto:hypunit at gmail.com>>
> > >
> > >                                  <mailto:hypunit at gmail.com
> > >                 <mailto:hypunit at gmail.com>
> > >
> > >                         <mailto:hypunit at gmail.com
> > >                 <mailto:hypunit at gmail.com>>>> wrote:
> > >                                        > > Hi All,
> > >                                        > >
> > >                                        > > I have some questions
> > >                 regarding the VM deployment
> > >                                  through OS
> > >                                       template...
> > >                                        > >
> > >                                        > > 1. I have imported centos
> > >                 template from openstack
> > >                                  glance (the
> > >                                       actual size of the template is
> > >                 16GB but used is
> > >                         1GB)...now my
> > >                                       question is if i deploy the new
> > >                 VM with this
> > >                         template,the
> > >                                  process
> > >                                       will copy the whole 16GB or just
> > >                 1 GB to create
> > >                         the new VM ??
> > >                                        > >
> > >                                        > > 2. I find disk size can not
> > >                 modify at the
> > >                         time of VM
> > >                                       provisioning,is there any way to
> > >                 modify the VM
> > >                         disk size ??
> > >                                        > >
> > >                                        > > Thanks,
> > >                                        > > Punit
> > >                                        > >
> > >                                        >
> > >                                        >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
> > --
> >
> > Med Vänliga Hälsningar
> >
> >
> > -------------------------------------------------------------------------------
> > Karli Sjöberg
> > Swedish University of Agricultural Sciences Box 7079 (Visiting Address
> > Kronåsvägen 8)
> > S-750 07 Uppsala, Sweden
> > Phone:  +46-(0)18-67 15 66
> > karli.sjoberg at slu.se
> >

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